Which of the following factors is NOT relevant in determining if an individual is in custody?

Determining whether an individual is in custody involves considering various situational factors that indicate the level of control exerted by law enforcement over a suspect. The correct answer highlights that the suspect's criminal history is not relevant in this assessment.

Criminal history might influence how officers interact with a suspect or how a suspect behaves, but it does not directly affect whether the suspect is in custody at the moment of the encounter. Custody is primarily concerned with the immediate circumstances—such as the atmosphere, environment, and dynamics of the interaction—rather than the individual's past behaviors or offenses.

In contrast, factors like the location of the interrogation, the demeanor of the suspect, and the number of officers present are all pertinent as they can directly influence whether a reasonable person in the suspect’s position would feel free to leave or feel that they are under significant restraint. For instance, a suspect in a police station surrounded by multiple officers may feel more constrained than someone being questioned in a public space, which could impact the determination of custody.